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Which of the following electronic configurations are not allowed for an atom? Choose all the correct answers. (a) 2s22p6 (b) 3s23p7 (c) 3d74s2 (d) 3d104s2 4p6 (e) 1s2 2s22d1 ?

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Kottherva Sreevidya
Kottherva SreevidyaLv10
19 Oct 2020

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